ul {
    list-style-type: none ;
    margin: 0px auto;
    padding: 0px ;
    background-color: blue;
    color: red;
    width: 750px;
    text-align: center;
}

a:link, a:visited {
    text-align: center;
    text-decoration: none;
    background-color: blue;
    color: red;
    width: 150px;
}

a:active, a:hover {
    background-color: black;
}

li {
    display: inline;
    padding: 5px;
    padding-left: 5px;
    padding-right: 5px;
}
